diff --git a/src/packet.c b/src/packet.c
index c221146..bc2701d 100644
--- a/src/packet.c
+++ b/src/packet.c
@@ -45,9 +45,6 @@ int packet_compare(const char *sent, const char *received, size_t packet_size)
 {
     const struct icmphdr *sent_hdr = (const struct icmphdr*) sent;
     const struct icmphdr *received_hdr = (const struct icmphdr*) received;
-    
-    if (received_hdr->type != 0 || received_hdr->code != 8)
-        return 1;
 
     if (received_hdr->un.echo.sequence == sent_hdr->un.echo.sequence)
         return 2;
@@ -62,6 +59,9 @@ int packet_check(char *packet, size_t packet_size)
 {
     struct icmphdr *hdr = (struct icmphdr *) packet;
     
+    if (hdr->type != 0 || hdr->code != 8)
+        return 1;
+
     const uint16_t checksum_bak = hdr->checksum;
     hdr->checksum = 0;
     int tmp = checksum(packet, packet_size);